If you're shopping for a full-size SUV, you probably already know that the domestics typically come in two wheelbases. It's true for the Chevy Suburban, GMC Yukon, and the Cadillac Escalade--and it's also true for the Ford Expedition and its cousin, the Lincoln Navigator, The long-wheelbase Expedition EL has a couple dozen more cubic feet of cargo space without suffering too great a gas mileage penalty; if your parking skills are strong, it has few other downsides.